Sprinter Ben Johnson wins the gold medal in the 100m sprint in Seoul inSeptember 1988. Behind him are Calvin Smith, Linford Christie and CarlLewis. Johnson later lost the medal when he tested positive forsteroids. REUTERS/Gary Hershorn

Sprinter Ben Johnson wins the gold medal in the 100m sprint in Seoul inSeptember 1988. Behind him are Calvin Smith, Linford Christie and CarlLewis. Johnson later lost the medal when he tested positive forsteroids. REUTERS/Gary Hershorn